US20070175712A1 - Spring brake for an industrial truck - Google Patents

Spring brake for an industrial truck Download PDF

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Publication number
US20070175712A1
US20070175712A1 US11/627,154 US62715407A US2007175712A1 US 20070175712 A1 US20070175712 A1 US 20070175712A1 US 62715407 A US62715407 A US 62715407A US 2007175712 A1 US2007175712 A1 US 2007175712A1
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US
United States
Prior art keywords
brake
proximity switch
pressure plate
spring
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/627,154
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English (en)
Inventor
Thomas Hargarten
Jan Herschel
Ansgar Kuckoff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jungheinrich AG
Original Assignee
Jungheinrich AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jungheinrich AG filed Critical Jungheinrich AG
Assigned to JUNGHEINRICH AKTIENGESELLSCHAFT reassignment JUNGHEINRICH AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HARGARTEN, THOMAS, HERSCHEL, JAN, KUCKHOFF, ANSGAR
Publication of US20070175712A1 publication Critical patent/US20070175712A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/58—Combined or convertible systems
    • B60T13/588—Combined or convertible systems both fluid and mechanical assistance or drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/02—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with mechanical assistance or drive
    • B60T13/04—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with mechanical assistance or drive by spring or weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/22—Brakes applied by springs or weights and released hydraulically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • F16D65/186—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes with full-face force-applying member, e.g. annular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets
    • F16D2121/22—Electric or magnetic using electromagnets for releasing a normally applied brake

Definitions

  • Such spring brakes are usually installed in the housing of a motor in an industrial truck or set up on a motor housing.
  • a brake disc is rotatingly driven by the motor shaft, whereas an electromagnet fixed in the brake housing is stationary and acts on a pressure plate between brake disc and electromagnet.
  • the pressure plate is pre-tensioned against the brake disc with the aid of a pre-loaded spring.
  • the braking condition is established when the electromagnet is not energised.
  • the magnet is actuated and pulls the pressure plate towards him, so that the brake disc can rotate freely.
  • Such a spring brake is used as service brake system for industrial trucks.
  • the triggering takes place via the travel steering, for instance.
  • the vehicle can be controlled and braked down with the aid of the spring brake in the case of a malfunction of a steering.
  • This function is designated as an emergency stop and can be initiated in the various security checks of the steerings. Travel permission takes place when the vehicle is switched on and a self-test is performed with a positive result.
  • the mentioned means for establishing the switch status of a spring brake do not require additional mechanical measures, on the other hand, electronic means are required in order to apply a desired voltage course on the electromagnet and to analyse the resulting current course.
  • Micro switches have the disadvantage that sensing takes place by contact and is therefore not free from wear. When used in cold warehouses, the micro switch may freeze fast and therefore provide an erroneous signal.
  • the present invention is based on the objective to provide a spring brake for industrial trucks in which the switch status of the spring brake can be detected by simple and safe means.
  • a proximity switch is installed in the brake housing.
  • An initiator for the proximity switch is connected with the pressure disc of the spring brake.
  • the hysteresis for the inductive proximity switch is smaller than the minimum travel of the pressure plate
  • the invention it has been recognised that it is sufficient to establish whether the pressure disc is picked up by the electromagnet or whether it is pressed against the brake disc by the pre-loaded spring.
  • a simple inductive proximity switch is sufficient, the output signal of which makes a yes/no-decision possible.
  • the proximity switch is actuated by a pin, connected with the pressure plate, which approaches the proximity switch more or less according to the position of the pressure plate.
  • an inductive proximity switch has a certain hysteresis. According to the present invention, this hysteresis is smaller than the minimum travel of the pressure plate.
  • a switch-over of the proximity switch is achieved in every case when the pressure plate is moved from one end of the travel path to the other one.
  • the initiator which may be realised as a pin, is adjustable in its axial position, in order to trim it with respect to the proximity switch.
  • the cupped brake housing has a recess on the girth, in which the proximity switch is installed.
  • the proximity switch does not exceed the outer dimensions of the brake or the brake housing, respectively.
  • the initiator pin extends through the bottom of the recess.
  • FIG. 1 shows a section through a typical spring brake.
  • FIG. 2 shows a part of the brake housing of the spring brake according to FIG. 1 , in a perspective view.
  • FIG. 3 shows the switching path of a proximity switch according to FIG. 2
  • FIG. 4 shows the brake housing according to FIG. 1 in a perspective view, with another embodiment of a proximity switch or a placement, respectively.
  • the brake spring according to FIG. 1 has a brake housing 10 , in which an electromagnet 12 is accommodated.
  • the brake housing 10 is attached on a plate 14 , which is vehicle-fixed. It is dealt with an industrial truck, and the brake serves to slow down a shaft 16 , which is a part of a not shown motor of the industrial truck.
  • a brake disc 18 On the shaft 16 sits a brake disc 18 and rotates with it, however, it is axially fixed.
  • friction pads 20 and 22 respectively, sit on opposite sides.
  • a pressure plate 24 is disposed, which is arranged to be axially movable in a restricted extent, but being splined, however.
  • the pressure plate is pre-tensioned against the brake disc 18 by several pre-loaded springs 28 .
  • the brake housing 10 is fixed on the plate 14 with the aid of several bolts, one of which is represented at 30 . With the aid of these bolts 30 , the distance between the plate 14 and the brake housing 10 can be adjusted.
  • the travel s is minimal. At increasing wear, the travel becomes greater according to the wear-away of the friction pads 20 , 22 .
  • the brake housing 10 is cupped.
  • a recess 32 is formed in the sidewall of the brake housing 10 , with a bottom 34 , a first sidewall 36 and a second sidewall 38 .
  • the bottom 43 is approximately trigonal, so that the contour of recess 32 results from this.
  • a pin 40 extends through the bottom 34 , which has a head 42 .
  • the pin is screwed together with the pressure plate 24 , a nut for this purpose being recognizable at 44 .
  • the pin moves upon travel of the pressure plate 24 .
  • a proximity switch (not recognizable) is accommodated in an elongated housing 46 , which is connected to a steering for the industrial truck via a line 48 .
  • the head 42 of the pin 40 has a minimum distance when maximally approaching the proximity switch, of one millimetre for instance.
  • the proximity switch is opened or closed depending on the position of the head 42 .
  • FIG. 3 the switching path of the proximity switch is shown, wherein the shift of the proximity switch with respect to the pin 40 or its head 42 is intended to be indicated by the opposing arrows.
  • the proximity switch has a hysteresis, which has to taken into account. It is indicated by the dashed lines at 52 .
  • the minimum travel path of the shown brake is represented.
  • the minimum travel path 54 is greater than the hysteresis 52 , so that even at minimum travel the proximity switch has differing positions, depending on whether the brake magnet picks up the pressure plate or whether the pre-loaded springs press it against the brake disc 18 .
  • the construction realisation according to FIG. 2 has the advantage that the switching means for detecting the status of the spring brake do not increase the dimensions of the brake.
  • the brake housing 10 is shown, which is similar to the brake housing 10 in FIG. 1 or 2 , respectively.
  • a modified proximity switch 46 a It is realised to be pipe-shaped and is attached on an angular plate part 56 , which is screwed on the wall 36 of the recess 32 with the aid of screws.
  • the proximity switch 46 a is held fast on opposing sides of an upper plate portion, which is provided with a corresponding bore, with the aid of nuts.
  • the pin 40 may be fixedly connected with the pressure plate 24 by weldings or the like, for instance. Trimming takes place with the aid of the proximity switch 46 and related nuts.
  • any dependent claim which follows should be taken as alternatively written in a multiple dependent form from all prior claims which possess all antecedents referenced in such dependent claim if such multiple dependent format is an accepted format within the jurisdiction (e.g. each claim depending directly from claim 1 should be alternatively taken as depending from all previous claims).
  • each claim depending directly from claim 1 should be alternatively taken as depending from all previous claims.
  • the following dependent claims should each be also taken as alternatively written in each singly dependent claim format which creates a dependency from a prior antecedent-possessing claim other than the specific claim listed in such dependent claim below.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Braking Arrangements (AREA)
US11/627,154 2006-01-28 2007-01-25 Spring brake for an industrial truck Abandoned US20070175712A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006004065A DE102006004065A1 (de) 2006-01-28 2006-01-28 Federspeicherbremse für ein Flurförderzeug
DE102006004065.1 2006-01-28

Publications (1)

Publication Number Publication Date
US20070175712A1 true US20070175712A1 (en) 2007-08-02

Family

ID=38268175

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/627,154 Abandoned US20070175712A1 (en) 2006-01-28 2007-01-25 Spring brake for an industrial truck

Country Status (2)

Country Link
US (1) US20070175712A1 (de)
DE (1) DE102006004065A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108644265A (zh) * 2018-05-22 2018-10-12 荣成华东锻压机床股份有限公司 机械压力机制动器摩擦块智能测控装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008003783A1 (de) * 2008-01-10 2009-07-16 Baumüller Nürnberg GmbH Vorrichtung und Verfahren zur Bestimmung des Schaltzustandes einer Bremse oder einer Kupplung
DE102010009166B4 (de) * 2010-02-24 2016-07-28 Honigmann Industrielle Elektronik Gmbh Hystereseeinheit
DE102014000196B4 (de) 2013-03-01 2020-07-09 Sew-Eurodrive Gmbh & Co Kg Bremsanordnung, insbesondere aufweisend eine elektromagnetisch betätigbare Federdruckbremse
DE102015100178A1 (de) * 2015-01-08 2016-07-14 Linde Material Handling Gmbh Fahrantrieb eines Flurförderzeugs mit einem Elektromotor und mit einer Federspeicherbremseinrichtung
DE102015100176A1 (de) * 2015-01-08 2016-07-14 Linde Material Handling Gmbh Fahrantrieb eines Flurförderzeugs mit einem Elektromotor und mit einer Federspeicherbremseinrichtung
AT517317B1 (de) * 2015-05-27 2017-06-15 Knorr-Bremse Ges Mit Beschränkter Haftung Positionsdetektor
EP3623655A1 (de) * 2018-09-17 2020-03-18 Ondal Medical Systems GmbH Lageranordnung mit einer bremsvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905289A (en) * 1956-02-13 1959-09-22 Jack & Heintz Inc Torque sensing brake release mechanism
US6349798B1 (en) * 1998-10-28 2002-02-26 Lucas Industries Limited Brake assembly
US6536563B1 (en) * 1998-11-20 2003-03-25 Pintsch Bamag Antriebs-Und Verkehrstechnik Gmbh Brake with adjustable play

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
DE4031245C3 (de) * 1990-10-04 1998-03-26 Baumueller Nuernberg Gmbh Scheibenbremse mit Mikroschalter
DE29510246U1 (de) * 1995-06-23 1995-08-24 Chr. Mayr Gmbh + Co Kg, 87665 Mauerstetten Elektrisch betätigte Bremse, insbesondere Reibungsbremse
DE19548517B4 (de) * 1995-12-22 2004-11-04 Linde Ag Verfahren zum Bremsen eines Fahrzeugs und Vorrichtung zur Durchführung des Verfahrens
DE19922251A1 (de) * 1999-05-14 2000-11-16 Mayr Christian Gmbh & Co Kg Anordnung zur optischen Lüftungsüberwachung bei einer elektromagnetisch gelüfteten Federdruckbremse
DE10049168C2 (de) * 1999-10-19 2003-12-18 Stromag Ag Elektromagnetische Bremse
DE10149604A1 (de) * 2001-10-09 2003-04-10 Pintsch Bamag Gmbh Verfahren und Vorrichtung zur Überwachung des Betriebszustands einer elektromagnetisch betätigbaren Bremse
US6799662B1 (en) * 2003-05-09 2004-10-05 Hillmar Industries Ltd. Spring-actuated, hydraulically releasable brakes
DE202005009053U1 (de) * 2005-06-09 2005-08-25 Intorq Gmbh & Co. Kg Vorrichtung zur Überwachung einer elektromagnetisch betätigten Bremse

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905289A (en) * 1956-02-13 1959-09-22 Jack & Heintz Inc Torque sensing brake release mechanism
US6349798B1 (en) * 1998-10-28 2002-02-26 Lucas Industries Limited Brake assembly
US6536563B1 (en) * 1998-11-20 2003-03-25 Pintsch Bamag Antriebs-Und Verkehrstechnik Gmbh Brake with adjustable play

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108644265A (zh) * 2018-05-22 2018-10-12 荣成华东锻压机床股份有限公司 机械压力机制动器摩擦块智能测控装置

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Publication number Publication date
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Legal Events

Date Code Title Description
AS Assignment

Owner name: JUNGHEINRICH AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HARGARTEN, THOMAS;HERSCHEL, JAN;KUCKHOFF, ANSGAR;REEL/FRAME:018879/0274

Effective date: 20070117

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION